Water heater



Sept. 22, 1931.

F. J. BEDNIZR WATER HEATER Filed Feb. 6, 1950 Patented Sept. 22, 1931 UNITED STATES FRANCIS .'r. Brennan, or CHICAGO, 5'rLLrNors WATER HEATERV Y Application inea February e; 1930. serial No. 426,251.

This invention relates to a water heater and more particularly to a drop tube boiler of a type suitable for use in hot water heating systems in buildings and the lilre.-

It is an important object of this invention to provide a water heater of novel construction wherein the water is adapted to be circulated in a manner especially adapted to obtain a high rate of heat transfer.

It is a further important object of this invention to provide a drop 'lube type of boiler wherein the cold water and hot water are not permitted to mix indiscriminately and wherein rapid circulation is elected through vertical concentric tubes extending into close proximity to the source of heat.

Other and further important objects of this invention will become apparent from the disclosures in the specication and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a view in perspective of a furnace embodying the principles of my invention, with a. part of the furnace housing broken away and in section.

Figure 2- is a sectional view taken substantially on the line II-II of Figure 3.

Figure 3 is a sectional view taken substan tially on the line III-III of Figure 2.

Figure 4 is an enlarged fragmentary sectional view of the drop tubes.

As shown on the drawings:

The reference numeral 1 indicates as a whole a heating device or furnace, in which is mounted a drop tube boiler 2 of my invention. As shown, the furnace 1 comprises an outer cylindrical shell or body portion 8 and an inner concentric shell 4 spaced therefrom to form a cold water chamber 5 extending the full height of the furnace housing. Water may be introduced initially into said chamber 5 by means of a pipe 6 controlled by a valve 7. A cold water return line 8 likewise enters into the chamber 5 near the bottom thereof.

A pair of plates 9 and 10 are secured at their peripheries to the inner shell 4 in spaced relationto the top 11 and toeach other,these plates lbeing preferably horizontal. The plate9 is joined to the upper edge of the shell 4 to forma continuation of the chamber 5 thereabove. formed a hot water chamber 12. Hot water pipes 13 and 14 extend through the top 11 into the upper plate 9 to permit hot water to be drawn from the chamber 12.

In accordance with the principles of my invention, a plurality of vertically extending tubes 15 are secured at their upper edges, as at 16, to the plate 10 so as to open into the hot water chamber l2. The lower ends of said pipes 15, which are of varied length decreasing toward the center of the furnace, are threaded as at 17 for receiving threaded caps 18. Into each of said pipes l5 extends a concentric smaller pipe 19, secured at its upper end as at 20 to the plate 9. each' of said pipes 19 extends approximately to the bottom of said pipe 15 and is there slit Between the plates 9 and 10 is The lower end of and flared to provide openings 21 for the upward circulation of water into the space 22 surrounding said inner pipe 19. Water from the cold water chamber 5 thus circulates above the plate 9 and downwardly through the small pipes 19 into the larger pipes 15, and thence through the annular spaces 22 up into the hot water chamber 12. In this way the cold water is kept separate from the hot water as much as possible and rapid circulation is secured in the pipes 15 and 19 due to their arrangement and proximity to the lire bed.

I am aware that many changes may be made and numerous details of construction may he varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

A water heater having a hot water outlet and a cold water inlet, said heater comprising a casing defining a ire box space, an apertured top plate on said casing, a second casing enveloping said first casing in spaced relation thereto defining a cold water space therewith, an internal partition member in said first casing adjacent said top plate defining a hot Water space therewith, a plurality of tubes extending downwardly rom said partition member communicating with the hot water space, said tubes having a closed bottom, other 5 tubes communicating with the cold water space extending downwardly from said top plate into said first named tubes arranged Providing o Spoor@ for oiroulatingwator thorobetween, the lower end of said other tubes be- 19 ing arranged terminating a substantial distance above the bottom of said first tubes, means adapted to restrict the How of hot water in said irst tubes,`said means comprising a flared lower end portion Of said other tubes,

l5 and a plurality of slits in said flared portion. lo testimony whereof l have hereunto su@ ,Sorbool my name at Chicago, Crook County,

Illinois- FRANGIS J., BEDNER- so 

